liquefaction dcl processes and technology for coal and biomass conversion

PDF Coal Conversion Pathway to Alternate Fuels

PDF Coal Conversion Pathway to Alternate Fuels

Coal Liquefaction Technology and Status ... Coal Conversion Processes Carbonization and Pyrolysis Low severity (mild gasification) High temperature Direct Liquefaction ... Shenhua DCL Process ; Miller EIA 2007 03/28/07 Department of Energy ; 15 ;

Direct liquefaction (DCL) processes and technology for coal and biomass ...

Direct liquefaction (DCL) processes and technology for coal and biomass ...

Basic conversion chemistry, chemical structures of coal and lignin biomass are discussed, followed by process technologies for direct liquefaction, liquid quality, process control and modeling, advantages and limitations, and future trends.

Coal Based synthetic fuel: Interesting possibility?

Coal Based synthetic fuel: Interesting possibility?

ICL includes two steps; in the first step, coal is converted into syngas ( Coal+H2OCO+H2), and during the last step, syngas is synthesized in the presence of a catalyst into liquid fuels.

Direct liquefaction (DCL) processes and technology for coal and biomass ...

Direct liquefaction (DCL) processes and technology for coal and biomass ...

Fingerprint Abstract This chapter focuses on liquefaction of solids, primarily coal and biomass sources such as lignin. In a twostep process the molecular structure is broken into fragments and hydrogenated, increasing the hydrogentocarbon ratio and preventing retrogressive reactions.

Molybdenum Hexacarbonyl as a Catalyst Precursor for SolventFree Direct ...

Molybdenum Hexacarbonyl as a Catalyst Precursor for SolventFree Direct ...

The conversion of coal to products soluble in tetrahydrofuran correlated strongly with the initial rate of gas uptake. The cyclohexane conversion of coal was also catalyzed. ... (DCL) processes and technology for coal and biomass conversion. 2011, 105154. ... A new process for catalytic liquefaction of coal using dispersed MoS2 catalyst ...

(PDF) Recent Advances in Direct Coal Liquefaction ResearchGate

(PDF) Recent Advances in Direct Coal Liquefaction ResearchGate

catalyst in the DCL of Shenhua coal at 400 °C. and MPa H. 2. resulted in a coal conversion and (gas + oil) yield, up to % and %, respectively, much higher than those obtained with FeS ...

Plantwide modeling of an indirect coalbiomass to ... ResearchGate

Plantwide modeling of an indirect coalbiomass to ... ResearchGate

The environmental footprint of coal liquefaction processes can usually be reduced by coprocessing coal and biomass and applying CO 2 capture and storage (CCS) technology but at the cost of higher ...

Economic and environmental analyses of coal and biomass ... ScienceDirect

Economic and environmental analyses of coal and biomass ... ScienceDirect

The results showed the price of coal had a more dominant effect on RSP than that of biomass. Different mix ratios and conversion rates led to RSP ranging from /bbl. LCA results indicated that GHG emissions ranged from kg CO2 eq to kg CO 2 eq/1000 MJ of liquid fuel at various biomass to coal mix ratios and ...

Catalysis and Catalyst Dispersion in Coal Liquefaction

Catalysis and Catalyst Dispersion in Coal Liquefaction

This article is cited by 42 publications. Tengfei Yang, Congcong Liu, Wenan Deng, Chuan Li, Liyong Gan, Qingshan Niu. Influence of the Iron Proportion on the Efficiency of an OilSoluble NiFe Catalyst Applied in the Coliquefaction of Lignite and Heavy Residue.

Coal to Liquids Technologies | SpringerLink

Coal to Liquids Technologies | SpringerLink

For the most highly developed processes, coal conversion can be as high as 90% on a mineral ash free basis, with a C 5+ distillate yield up to 75% and hydrogen consumption of 57%wt. When an external catalyst is used, it is typically some combination of cobalt, nickel, and molybdenum on a solid acid support such as silicaalumina [].DCL process concepts have been based on a variety of ...

A review of lowrank coals liquefaction processes containing water and ...

A review of lowrank coals liquefaction processes containing water and ...

There are many liquefaction processes related to DCLS [26], [29], [31], [108], [109]. Several typical or highly referential liquefaction processes that have been reported are selected in this paper for introduction. As an illustration, a flow diagram of coal liquefaction process using syngas was proposed by Fu et al. [29], as shown in Fig. 14.

Coal Conversion Processes ResearchGate

Coal Conversion Processes ResearchGate

Pyrolysis is one of the prospective processes that can be utilized to obtain high value chemicals and energy from coal and biomass. Coalbiomass copyrolysis presents a green, lowrisk, cheap ...

PDF Overview of Coaltoliquids: a Historical Perspective

PDF Overview of Coaltoliquids: a Historical Perspective

oaltoliquids (TL) technology enables conversion of abundant coal into valuable liquid fuels such as gasoline, diesel, and jet fuel. Methods include indirect conversion (coal to syngas, which can be converted to liquid hydrocarbons) or direct conversion (by various direct coal liquefaction methods).

Direct liquefaction techniques on lignite coal: A review

Direct liquefaction techniques on lignite coal: A review

Generally, Fig. 1 shows the distinct difference between the direct and indirect liquefaction processes. Importantly, DCL consists of many steps for the conversion of coal to PA (preasphaltenes) and AS (asphaltenes), and subsequently to gas, oil, and residue [60]. Download : Download highres image (180KB) Download : Download fullsize image ...

Process modeling of direct coalbiomass to liquids ... ScienceDirect

Process modeling of direct coalbiomass to liquids ... ScienceDirect

In the DCL technology, coal is converted to liquid by adding hydrogen at high pressure and temperature. Various DCL technologies have been developed in last hundred years such as Solvent Refined Coal (SRC)I and SRCII, Exxon Donor Solvent (EDS), HCoal and catalytic twostage liquefaction (CTSL) [7], [8], [9], [10].

Coal gasification and conversion ScienceDirect

Coal gasification and conversion ScienceDirect

Direct coal liquefaction (DCL) commonly refers to catalytic hydrogenation of coal in a recycled oil solvent at high pressures with a catalyst. While a range of process configurations have been proposed, the most common version involves at least two high pressure slurry reactors in a series using a dispersed ironbased catalyst and hydrogen ...

 Direct Liquefaction Processes |

Direct Liquefaction Processes |

The DCL process involves adding hydrogen (hydrogenation) to the coal, breaking down its organic structure into soluble products. The reaction is carried out at elevated temperature and pressure (, 750 to 850°F and 1,000 to 2,500 psia) in the presence of a solvent. The solvent is used to facilitate coal extraction and the addition of hydrogen.

Comprehensive competitiveness assessment of four coalto ... ResearchGate

Comprehensive competitiveness assessment of four coalto ... ResearchGate

Coal to liquid technology includes direct coal liquefaction (DCL), indirect coal liquefaction (ICL), coal to methanol to gasoline (CTMTG), and coal tar hydrogenation (CTH) (Xie, 2021; Zhang et al ...

Coal utilization processes and their application to ... ScienceDirect

Coal utilization processes and their application to ... ScienceDirect

The use of highcarbonbased feeds to produce alternative fuels and valueadded chemicals is discussed. Basic conversion chemistry, chemical structures of coal and lignin biomass are discussed, followed by process technologies for direct liquefaction, liquid quality, process control and modeling, advantages and limitations, and future trends.

PDF OPEN ACCESS energies

PDF OPEN ACCESS energies

Keywords: direct coal liquefaction (DCL); processes; influencing factors; coal pretreatment; catalysts; coliquefaction; biomass 1. Introduction Due to the rapid increase in demand for petroleum and its declining reserves, the concern over energy security has intensified the interest in coal liquefaction, especially for those countries which are

Different Feedstocks and Processes for Production of ... Springer

Different Feedstocks and Processes for Production of ... Springer

Coal. Direct coal liquefaction (DCL) and indirect coal liquefaction (ICL) are the two prominent processes for coaltomethanol conversion. DCL primarily involves thermal breaking of the polymeric coal structure at elevated temperatures with subsequent hydrogenation of the fragments to generate lighter molecules.

Free FullText | Recent Advances in Direct Coal Liquefaction MDPI

Free FullText | Recent Advances in Direct Coal Liquefaction MDPI

Coal can also be liquefied directly into liquid fuels through direct coal liquefaction (DCL) processes at around 450500 °C under 1530 MPa H 2 in a suitable solvent with appropriate catalysts [ 2, 3, 4, 5, 6, 7, 8, 9 ].

Overview of Obtaining Alternative Fuels in The Coliquefaction Processes ...

Overview of Obtaining Alternative Fuels in The Coliquefaction Processes ...

The liquefaction process of coal and biomass materials, which is known as "Coliquefaction", has not been developed in Malaysia. The yields and quality (especially H/C ratio) of the liquid products obtained from coal under less severe liquefaction conditions (at lower temperature and pressure) can be improved with coliquefaction of coal ...

4 Direct liquefaction (DCL) processes and technology for coal and biomass conversion

4 Direct liquefaction (DCL) processes and technology for coal and biomass conversion

Basic conversion chemistry, chemical structures of coal and lignin biomass are discussed, followed by process technologies for direct liquefaction, liquid quality, process control and modeling, advantages and limitations, and future trends.